Now I of course have the typical annoyance about the stolen/really bad skins and so on, but personally, I would say customer service.
Now I have only been here for a year or so but I have had my fair share of run-ins with staff members of this website. Mainly throwing accusations at me about how my pixel arts are fake and hacked (quite annoying because I spend hours on those). I am not going to name anyone, but a few specific staff targeted me in chat when I tried to argue my rights, even going as far as changing the name of the chat to mock me. That right there was the most immature behavior for any staff member of a website that I had ever seen. However, fortunately I had some good friends who helped me out in getting my stuff back up on the website. So it was all good in the end, but the process of getting my works un-deleted; with all the crap I was given, seriously tainted my opinion of some of the people on this website.
